US5265095A - Method for inputting signals into and outputting signals out from subareas of the auxiliary signals of transport modules of a synchronous digital signal hierarchy - Google Patents

Method for inputting signals into and outputting signals out from subareas of the auxiliary signals of transport modules of a synchronous digital signal hierarchy Download PDF

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Publication number
US5265095A
US5265095A US07/602,301 US60230190A US5265095A US 5265095 A US5265095 A US 5265095A US 60230190 A US60230190 A US 60230190A US 5265095 A US5265095 A US 5265095A
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bus
bytes
subareas
signals
interface means
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US07/602,301
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Udo Fiedler
Walter Lechler
Gerhard Musil
Wilhelm Volejnik
Guenter Weimert
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Nokia Solutions and Networks GmbH and Co KG
US Philips Corp
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Siemens AG
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Assigned to SIEMENS AKTIENGESELLSCHAFT A GERMAN CORP., U.S. PHILIPS CORPORATION reassignment SIEMENS AKTIENGESELLSCHAFT A GERMAN CORP. ASSIGNORS ASSIGN TO ASSIGNEES ONE-HALF INTEREST Assignors: LECHLER, WALTER, MUSIL, GERHARD, VOLEJNIK, WILHELM, WEIMERT, GUNTER
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/08—Intermediate station arrangements, e.g. for branching, for tapping-off

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  • the invention is directed to a method for outputting signals from at least one subarea of auxiliary signals and for inputting new or modified signals into at least one free of freed up subarea of transport modules of a synchronous digital signal hierarchy according to the CCITT Draft Recommendations G.70X, G.70Y and G.70Z, in accord wherewith the frame of the transport modules is composed of 9 rows and N-times 270 columns (N is a whole number) for respectively one byte per row and column and contains an administration unit for the acceptance of virtual containers whose frame start is marked by pointers.
  • U.S. Pat. No. 4,574,375 discloses a an interface arrangement for a telephone system or the like.
  • complete digital signals incoming on a bus line have their channel nested in a pulse frame taken for a processing such as setting signal level, dual tone multi-frequency signaling or network echo elimination and are subsequently returned onto a bus line.
  • auxiliary signals nor subareas thereof are separately input or output.
  • This object is inventively achieved by a method in which: the subareas are spread; the spread subareas are combined serially or in parallel to a bus together with additional control signals; bytes or byte groups are parted from the bus as signals and are output; and, for inputting, these method steps are implemented in the reverse sequence and in the opposite sense.
  • a transport module of the higher order is resolved into transport modules of a lower order, and, when inputting, transport modules of a lower order are combined to form a transport module of the higher order in the corresponding method step.
  • Every subarea can be composed of at least one complete column.
  • the bit rate of the spread signal can be selected such that it is a single or a whole-numbered multiple of a bit rate standardized by CCITT.
  • the size of the subareas can be selected such that a bit rate that is a single or a whole-numbered multiple of a bit rate standardized by CCITT derives from the sum thereof after the spreading.
  • One or more section overheads can be selected as a subarea, one or more path overheads can be selected as a subarea, or one or more pointers can be selected as a subarea. Areas documented for fixed stuffing can be selected as subarea.
  • the bytes from a respective transport module of the lower order can be serially transmitted in the bus on their own line.
  • the output bytes can be transmitted bit-parallel in the bus on eight lines
  • Bytes or byte groups parted from the bus can be sorted and combined to form at least one new time-division multiplex signal.
  • the byte selection from the bus can be locally undertaken via switches, or remotely controlled via control buses. Only freely available bytes are combined in the bus and an identifier of the freely available bytes is transmitted.
  • Additional control signals can be frame, bit, byte, byte group, section overhead row and spread bit clocks or externally generated control signals can be selected instead of the additional control signals.
  • FIG. 1 shows a transport module STM-1 having a virtual container VC-4;
  • FIG. 2 shows a transport module STM-1 having a virtual container VC-4 and having four virtual containers VC-31;
  • FIG. 3 shows a transport module STM-1 having a virtual container VC-4 and having three virtual containers VC-32;
  • FIG. 4 shows a section overhead for a transport module STM-1
  • FIG. 5 shows a transport module STM-N
  • FIG. 6 shows a pulse diagram for explaining the signal spread
  • FIG. 7 shows a first bus arrangement
  • FIG. 8 shows a second bus arrangement
  • FIG. 9 shows a further-processing of the bus data.
  • FIG. 1 shows a known synchronous transport module STM-1. This is subdivided into the section overhead SOH, into an administration unit AU-4 and into an administration unit pointer AU-4 PTR.
  • a virtual container VC-4 can be inserted into the administration unit AU-4, whereby the administration unit pointer AU-4 PTR indicates where the virtual container VC-4 begins in the administration unit AU-4.
  • the virtual container VC-4 is in turn composed of a path overhead VC-4 POH and of a container C-4. The latter serves for the acceptance of a 139 264 kbit/s signal. Bytes having defined auxiliary signals that accompany the content of the container C-4 up to the multiplexing are situated in the path overhead VC-4 POH.
  • the transport module STM-1 is composed of 9 rows and 270 columns or, respectively, bytes.
  • the section overhead SOH and the administration unit pointer AU-4 PTR occupy 9 columns or, respectively, bytes. 261 columns or, respectively, bytes remain for the administration unit AU-4 or, respectively, for the virtual container VC-4.
  • One byte contains 8 bits.
  • FIG. 2 shows how four virtual containers VC-31 can be inserted into the virtual container VC-4 in a known way.
  • the virtual containers VC-31 are composed of a path overhead VC-31 POH that is 1-byte wide and extends over the first six rows and of a container C-31 that is 64 bytes wide. After the insertion of the four virtual containers VC-31 into the virtual container VC-4, space for four transport unit pointers TU-31 PTR remains therein.
  • a container C-31 can accept a 34 368 kbit/s signal.
  • FIG. 3 shows the known insertion of three virtual containers VC-32 into one virtual container VC-4.
  • a virtual container VC-32 is composed of a 1-byte wide path overhead VC-32 POH and of an 84-byte wide container C-32. After the insertion of the three virtual containers VC-32 into the virtual container VC-4, space remains for three transport unit pointers TU-32 PTR and for fixed stuff bits FS.
  • a container C-2 can accept a 44 736 kbit/s signal.
  • FIG. 4 shows the section overhead SOH in detail.
  • the bytes provided with letters are defined in the said CCITT Draft Recommendations.
  • the bytes provided with a cross are still freely available.
  • FIG. 5 shows a known transport module STM-N of a higher order whose column number is N times greater than that of the transport module STM-1.
  • the section overhead, corresponding, has N times as many columns.
  • FIG. 6 shows an inventive outputting of the section overhead SOH and of the administration unit point AU-4 PTR of a transport module STM-1.
  • Reference a shows a row of the transport module STM-1 and b shows the 9 bytes spread over the entire row. The processing speed of these bytes is thus reduced by a factor 1/30.
  • the spread onto the complete row length can also be slightly modified, whereby the transmission rate of the plesiochronic basic group of a PCM30 system is advantageously taken into consideration.
  • Reference c shows a corresponding spread and reference d shows three bytes of a PCM30 system for comparison. Taking a PCM24 system into consideration ensues analogously.
  • the spread factor is slightly lower in both instances since the 9 bytes no longer lay claim to the complete time span of the row.
  • the read clock for the bits of the 9 bytes can thereby be either internally generated in the system by division or can be supplied from the outside.
  • FIG. 7 shows a modification of the outputting of signals from subareas of a transport module STM-4 with a demultiplexing and spreading means 1A and customer interfaces 2A and 3A.
  • a transport module STM-4 is supplied to the demultiplexing and spreader means 1A. It then outputs respectively output subarea signals TB-STM-1 of a respective transport module STM-1 contained in the transport module STM-4 onto four lines L1 through L4 synchronized with one another. Control signals T run on the sub-bus SL. The four lines L1 through L4 and the sub-bus SL together form the bus B. After an input of addresses A, the corresponding bytes D can be taken from the bus B via the customer interfaces 2A and 3A.
  • FIG. 8 differs from that of FIG. 7 in that the demultiplexing and spreader means IB successively outputs the bytes of the transport modules STM-1 onto 8 lines L5 through L15 bit-parallel.
  • bus structures for example with data and address bus, are conceivable that are directly matched to microprocessor systems.
  • Reference e shows a transport module STM-1 whereof one row has already been shown in FIG. 6 under reference a.
  • Vertical strokes in reference e indicate 9 groups of 9 bytes each. These are selected in a defined way and are inserted reference (f) sorted into the pulse frame of a PCM30 system.
  • one byte can be output to a LF channel reference g having a bit rate of 64 kbit/s.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)
US07/602,301 1988-06-06 1989-06-02 Method for inputting signals into and outputting signals out from subareas of the auxiliary signals of transport modules of a synchronous digital signal hierarchy Expired - Lifetime US5265095A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3819259 1988-06-06
DE3819259A DE3819259A1 (de) 1988-06-06 1988-06-06 Verfahren zum ein- und auskoppeln von signalen in bzw. aus teilbereichen der zusatzsignale von transportmoduln einer synchronen digitalsignal-hierarchie

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US5265095A true US5265095A (en) 1993-11-23

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US (1) US5265095A (de)
EP (1) EP0428522B1 (de)
JP (1) JPH03502994A (de)
AU (1) AU617825B2 (de)
CA (1) CA1331639C (de)
DE (2) DE3819259A1 (de)
WO (1) WO1989012365A1 (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995010899A1 (en) * 1993-10-14 1995-04-20 Nokia Telecommunications Oy Forming a higher hierarchy level signal in a synchronous digital communication system
US5452307A (en) * 1993-10-20 1995-09-19 Hitachi, Ltd. Data multiplexing system having at least one low-speed interface circuit connected to a bus
US5465252A (en) * 1991-02-12 1995-11-07 Siemens Aktiengesellschaft Method for receiving and delivering section overheads of and for STM-1 signals in a section-overhead server of a network node
US5541931A (en) * 1995-03-27 1996-07-30 Hyundai Electronics Industries Co., Ltd. Data optical transmission apparatus utilizing multiplexer/demultiplexer mode
US5691986A (en) * 1995-06-07 1997-11-25 Hitachi America, Ltd. Methods and apparatus for the editing and insertion of data into an encoded bitstream
US5761200A (en) * 1993-10-27 1998-06-02 Industrial Technology Research Institute Intelligent distributed data transfer system
WO1999056421A1 (en) * 1998-04-24 1999-11-04 Sunny Comm, Inc. A method and apparatus for dynamic allocation of bandwidth to data with varying bit rates
US6049552A (en) * 1996-05-13 2000-04-11 Hyundai Electronics Industries Co., Ltd. Channel alignment circuit
US6556593B1 (en) * 1996-12-11 2003-04-29 International Business Machines Corporation Digital cross connect and add/drop multiplexing device for SDH or SONET signals
US7095711B1 (en) * 1996-07-18 2006-08-22 Fujitsu Limited Communication method and apparatus for a radio local area network system using macrodiversity
US7139791B1 (en) * 2000-07-13 2006-11-21 International Business Machines Corporation Apparatus and method for providing access to a data stream by a plurality of users at a same time

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4300466A1 (en) * 1992-01-15 1993-08-12 Siemens Ag Digital signal switching in interlaced DSM pulse frames
ES2093957T3 (es) * 1992-01-15 1997-01-01 Siemens Ag Procedimiento para la conmutacion de señales digitales.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4719624A (en) * 1986-05-16 1988-01-12 Bell Communications Research, Inc. Multilevel multiplexing
US5060229A (en) * 1989-05-12 1991-10-22 Alcatel Na Network Systems Corp. Serial transport frame format method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4574375A (en) * 1983-10-12 1986-03-04 Northern Telecom Limited Interface arrangement for a telephone system or the like

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4719624A (en) * 1986-05-16 1988-01-12 Bell Communications Research, Inc. Multilevel multiplexing
US5060229A (en) * 1989-05-12 1991-10-22 Alcatel Na Network Systems Corp. Serial transport frame format method

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5465252A (en) * 1991-02-12 1995-11-07 Siemens Aktiengesellschaft Method for receiving and delivering section overheads of and for STM-1 signals in a section-overhead server of a network node
GB2297228A (en) * 1993-10-14 1996-07-24 Nokia Telecommunications Oy Forming a higher hierarchy level signal in a synchronous digital communication system
WO1995010899A1 (en) * 1993-10-14 1995-04-20 Nokia Telecommunications Oy Forming a higher hierarchy level signal in a synchronous digital communication system
GB2297228B (en) * 1993-10-14 1998-06-24 Nokia Telecommunications Oy Forming a higher hierarchy level signal in a synchronous digital communication system
US5452307A (en) * 1993-10-20 1995-09-19 Hitachi, Ltd. Data multiplexing system having at least one low-speed interface circuit connected to a bus
US5757806A (en) * 1993-10-20 1998-05-26 Hitachi, Ltd. Data multiplexing system having at least one low-speed interface circuit connected to a bus
US5761200A (en) * 1993-10-27 1998-06-02 Industrial Technology Research Institute Intelligent distributed data transfer system
US5541931A (en) * 1995-03-27 1996-07-30 Hyundai Electronics Industries Co., Ltd. Data optical transmission apparatus utilizing multiplexer/demultiplexer mode
US5691986A (en) * 1995-06-07 1997-11-25 Hitachi America, Ltd. Methods and apparatus for the editing and insertion of data into an encoded bitstream
US6049552A (en) * 1996-05-13 2000-04-11 Hyundai Electronics Industries Co., Ltd. Channel alignment circuit
US7095711B1 (en) * 1996-07-18 2006-08-22 Fujitsu Limited Communication method and apparatus for a radio local area network system using macrodiversity
US6556593B1 (en) * 1996-12-11 2003-04-29 International Business Machines Corporation Digital cross connect and add/drop multiplexing device for SDH or SONET signals
WO1999056421A1 (en) * 1998-04-24 1999-11-04 Sunny Comm, Inc. A method and apparatus for dynamic allocation of bandwidth to data with varying bit rates
US6266345B1 (en) * 1998-04-24 2001-07-24 Xuan Zhon Ni Method and apparatus for dynamic allocation of bandwidth to data with varying bit rates
US7139791B1 (en) * 2000-07-13 2006-11-21 International Business Machines Corporation Apparatus and method for providing access to a data stream by a plurality of users at a same time
US20070136452A1 (en) * 2000-07-13 2007-06-14 Coleman David A Apparatus and Method for Providing Access to a Data Stream by a Plurality of Users at a Same Time
US8180913B2 (en) 2000-07-13 2012-05-15 International Business Machines Corporation Apparatus and method for providing access to a data stream by a plurality of users at a same time

Also Published As

Publication number Publication date
EP0428522B1 (de) 1993-09-15
EP0428522A1 (de) 1991-05-29
DE3819259A1 (de) 1989-12-07
DE58905643D1 (de) 1993-10-21
WO1989012365A1 (en) 1989-12-14
JPH048978B2 (de) 1992-02-18
AU617825B2 (en) 1991-12-05
JPH03502994A (ja) 1991-07-04
AU3680989A (en) 1990-01-05
CA1331639C (en) 1994-08-23

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